Question

the cost of a notebook is thrice the cost of a pen . write a linear equation in two variable for this situation .find the value of the book if the cost of the pen is 50

Answer 1

150 is the cost of book.......

Answer 2

let the cost of notebook is 'x'

and cost of pen is 'y'

therefore linear equation is x = 3y

as cost of pen is 50

y=50

x= 3y

x= 3*50

x=150

therefore cost of notebook is 150